<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>行内元素</title>
</head>
<!-- 无法设置宽高，而是本身的变化而变化 -->

<body>

    <span style="background-color: aqua;">哇哈哈哈哈</span>
    <span>哇哈哈哈哈</span> <span>哇哈哈哈哈</span> <span>哇哈哈哈哈</span>


</body>

</html>